There are delays of up to one hour on Virgin Trains East Coast Southbound between Doncaster and Retford due to fire on a freight train.
Trains are currently unable to run from Retford towards Doncaster. The line from Doncaster towards Retford has reopened and trains in this direction are returning to normal.
The fire is affecting services from Bradford, Leeds, York and Hull to London.
Tickets are being accepted on Grand Central, Cross Country and East Midlands Trains services.